Fable 4.25.0

There is a newer prerelease version of this package available.
See the version list below for details.
dotnet tool install --global Fable --version 4.25.0
                    
This package contains a .NET tool you can call from the shell/command line.
dotnet new tool-manifest
                    
if you are setting up this repo
dotnet tool install --local Fable --version 4.25.0
                    
This package contains a .NET tool you can call from the shell/command line.
#tool dotnet:?package=Fable&version=4.25.0
                    
nuke :add-package Fable --version 4.25.0
                    

Fable: F# |> JS

Nuget Build Join the chat at https://gitter.im/fable-compiler/Fable

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Fable is an F# to JavaScript compiler powered FSharp Compiler Services, designed to make F# a first-class citizen of the JavaScript ecosystem. Check the website for more information and if you find the project useful, don't forget to give us a star!

Fable actually uses a fork of FCS with a few tweaks. Binaries are in lib/fcs folder. See this PR for more info.

Getting started

Check this page.

Building

Requirements

Use VSCode Dev Container

You can use VSCode Dev Container to get a preconfigured environment both with requirements and VSCode extensions.

  1. You need to have docker installed and running.
  2. Install the Dev Container extension in VSCode
  3. Open the project in VSCode and click on the green button in the bottom left corner.
Use your machine

Make sure the following requirements are installed in your system:

Build

Run ./build.sh or ./build.cmd to see the build options.

When using VSCode, you can also run the build tasks from the command palette (Ctrl+Shift+P) by typing Run Task and selecting the task you want to run.

We also configured several debug configurations that you can use from the debug panel (Ctrl+Shift+D). This is useful as you can attach the debugger to the Fable compiler process to check what's going on.

Contributing

Just by using Fable you're already contributing! You can help the community a lot by sharing examples and experiences in your personal (or Fable's) blog and/or by editing the Fable Resources page.

Send bug reports (ideally with minimal code to reproduce the problem) and feature requests to this GitHub repository. To interact with the community you can use the Gitter chat but please note maintainers are not checking the chat regularly.

If you are up to contribute a fix or a feature yourself, you're more than welcome! Please send first an issue or a minimal Work In Progess PR so we can discuss the implementation details in advance.

List of changelogs

Product Compatible and additional computed target framework versions.
.NET net6.0 is compatible.  net6.0-android was computed.  net6.0-ios was computed.  net6.0-maccatalyst was computed.  net6.0-macos was computed.  net6.0-tvos was computed.  net6.0-windows was computed.  net7.0 was computed.  net7.0-android was computed.  net7.0-ios was computed.  net7.0-maccatalyst was computed.  net7.0-macos was computed.  net7.0-tvos was computed.  net7.0-windows was computed.  net8.0 was computed.  net8.0-android was computed.  net8.0-browser was computed.  net8.0-ios was computed.  net8.0-maccatalyst was computed.  net8.0-macos was computed.  net8.0-tvos was computed.  net8.0-windows was computed.  net9.0 was computed.  net9.0-android was computed.  net9.0-browser was computed.  net9.0-ios was computed.  net9.0-maccatalyst was computed.  net9.0-macos was computed.  net9.0-tvos was computed.  net9.0-windows was computed.  net10.0 was computed.  net10.0-android was computed.  net10.0-browser was computed.  net10.0-ios was computed.  net10.0-maccatalyst was computed.  net10.0-macos was computed.  net10.0-tvos was computed.  net10.0-windows was computed. 
Compatible target framework(s)
Included target framework(s) (in package)
Learn more about Target Frameworks and .NET Standard.

This package has no dependencies.

Version Downloads Last Updated
5.0.0-alpha.13 1,225 5/4/2025
5.0.0-alpha.12 1,395 3/14/2025
5.0.0-alpha.11 736 3/3/2025
5.0.0-alpha.10 1,017 2/16/2025
5.0.0-alpha.9 1,088 1/28/2025
5.0.0-alpha.8 154 1/27/2025
5.0.0-alpha.7 395 1/23/2025
5.0.0-alpha.6 130 1/23/2025
5.0.0-alpha.5 794 1/9/2025
5.0.0-alpha.4 193 1/3/2025
5.0.0-alpha.3 593 12/18/2024
5.0.0-alpha.2 270 11/26/2024
5.0.0-alpha.1 129 11/24/2024
4.25.0 2,708 4/26/2025
4.24.0 27,742 11/19/2024
4.23.0 6,060 10/28/2024
4.22.0 9,680 10/2/2024
4.21.0 4,589 9/19/2024
4.20.0 3,934 9/4/2024
4.19.3 27,353 6/17/2024
4.19.2 453 6/13/2024
4.19.1 244 6/13/2024
4.19.0 1,857 6/10/2024
4.18.0 2,198 5/23/2024
4.17.0 13,660 4/23/2024
4.16.0 10,956 3/20/2024
4.15.0 1,016 3/18/2024
4.14.0 12,929 3/1/2024
4.13.0 4,791 2/20/2024
4.12.2 18,122 2/13/2024
4.12.1 829 2/13/2024
4.11.0 5,962 1/30/2024
4.10.0 18,878 1/25/2024
4.9.0 29,647 12/14/2023
4.8.1 1,611 12/12/2023
4.8.0 730 12/12/2023
4.7.0 8,936 12/6/2023
4.6.0 11,990 11/27/2023
4.5.0 25,845 11/7/2023
4.4.1 2,926 10/25/2023
4.4.0 20,105 10/24/2023
4.3.0 4,917 10/18/2023
4.2.2 4,173 10/14/2023
4.2.1 14,098 9/29/2023
4.1.4 52,368 5/16/2023
4.1.3 8,067 4/28/2023
4.1.2 4,040 4/22/2023
4.1.1 675 4/22/2023
4.1.0 1,091 4/18/2023
4.1.0-beta-001 678 4/16/2023
4.0.5 2,031 4/8/2023
4.0.4 2,258 4/4/2023
4.0.3 2,258 3/30/2023
4.0.2 1,127 3/27/2023
4.0.1 22,997 3/18/2023
4.0.0 6,799 3/14/2023
4.0.0-theta-018 54,854 11/19/2022
4.0.0-theta-017 631 11/16/2022
4.0.0-theta-016 779 11/13/2022
4.0.0-theta-015 602 11/5/2022
4.0.0-theta-014 414 10/31/2022
4.0.0-theta-012 1,201 10/14/2022
4.0.0-theta-011 979 10/4/2022
4.0.0-theta-010 428 9/28/2022
4.0.0-theta-009 426 9/28/2022
4.0.0-theta-008 464 9/22/2022
4.0.0-theta-007 406 9/21/2022
4.0.0-theta-006 443 9/18/2022
4.0.0-theta-005 380 9/17/2022
4.0.0-theta-004 505 9/14/2022
4.0.0-theta-003 345 9/12/2022
4.0.0-theta-002 303 9/11/2022
4.0.0-theta-001 388 9/9/2022
4.0.0-snake-island-alpha-026 415 9/8/2022
4.0.0-snake-island-alpha-025 391 9/6/2022
4.0.0-snake-island-alpha-024 542 9/2/2022
4.0.0-snake-island-alpha-023 348 8/30/2022
4.0.0-snake-island-alpha-021 925 8/21/2022
4.0.0-snake-island-alpha-020 436 8/14/2022
4.0.0-snake-island-alpha-019 481 7/31/2022
4.0.0-snake-island-alpha-018 340 7/30/2022
4.0.0-snake-island-alpha-017 378 7/27/2022
4.0.0-snake-island-alpha-016 344 7/26/2022
4.0.0-snake-island-alpha-015 311 7/26/2022
4.0.0-snake-island-alpha-014 356 7/25/2022
4.0.0-snake-island-alpha-013 335 7/25/2022
4.0.0-snake-island-alpha-012 471 7/12/2022
4.0.0-snake-island-alpha-011 338 6/23/2022
4.0.0-snake-island-alpha-010 343 6/3/2022
4.0.0-snake-island-alpha-009 302 6/2/2022
4.0.0-snake-island-alpha-008 326 6/1/2022
4.0.0-snake-island-alpha-007 347 5/25/2022
4.0.0-snake-island-alpha-006 307 5/24/2022
4.0.0-snake-island-alpha-005 329 5/23/2022
4.0.0-snake-island-alpha-004 307 5/21/2022
4.0.0-snake-island-alpha-003 329 5/20/2022
4.0.0-snake-island-alpha-002 304 5/19/2022
4.0.0-snake-island-alpha-001 331 5/11/2022
3.7.22 4,015 5/11/2023
3.7.21 279 5/11/2023
3.7.20 37,419 9/27/2022
3.7.19 577 9/27/2022
3.7.18 8,436 8/16/2022
3.7.17 6,971 7/21/2022
3.7.16 4,439 7/5/2022
3.7.15 976 6/29/2022
3.7.14 4,606 6/14/2022
3.7.12 3,823 5/27/2022
3.7.11 6,985 5/1/2022
3.7.10 829 4/29/2022
3.7.9 10,149 4/1/2022
3.7.8 1,789 3/24/2022
3.7.7 5,409 3/22/2022
3.7.6 2,990 3/16/2022
3.7.5 24,175 3/1/2022
3.7.4 980 2/25/2022
3.7.3 4,744 2/23/2022
3.7.2 1,419 2/22/2022
3.7.1 6,251 2/17/2022
3.7.0 8,755 2/7/2022
3.7.0-beta-015 1,278 1/26/2022
3.7.0-beta-014 365 1/24/2022
3.7.0-beta-012 416 1/18/2022
3.7.0-beta-011 351 1/14/2022
3.7.0-beta-010 316 1/14/2022
3.7.0-beta-009 325 1/12/2022
3.7.0-beta-008 303 1/11/2022
3.7.0-beta-007 333 1/11/2022
3.7.0-beta-006 311 1/11/2022
3.7.0-beta-005 336 1/7/2022
3.7.0-beta-004 315 1/5/2022
3.7.0-beta-003 376 1/4/2022
3.7.0-beta-002 302 12/28/2021
3.7.0-beta-001 318 12/20/2021
3.6.3 19,447 12/1/2021
3.6.2 8,837 11/26/2021
3.6.1 12,159 11/23/2021
3.6.0 1,762 11/19/2021
3.6.0-beta-003 443 11/17/2021
3.6.0-beta-002 299 11/15/2021
3.6.0-beta-001 327 11/14/2021
3.4.10 1,474 11/8/2021
3.4.9 2,567 11/5/2021
3.4.8 566 11/4/2021
3.4.7 1,690 10/28/2021
3.4.6 1,148 10/26/2021
3.4.5 810 10/21/2021
3.4.4 957 10/20/2021
3.4.3 20,411 10/14/2021
3.4.2 1,354 10/5/2021
3.4.1 587 10/4/2021
3.4.0 926 10/1/2021
3.3.1 1,795 9/27/2021
3.3.0 3,572 9/16/2021
3.3.0-beta-002 511 8/28/2021
3.3.0-beta-001 296 8/27/2021
3.2.14 1,436 9/11/2021
3.2.12 4,883 8/26/2021
3.2.11 6,210 8/19/2021
3.2.10 2,923 8/2/2021
3.2.9 47,314 7/8/2021
3.2.8 2,608 6/26/2021
3.2.7 572 6/25/2021
3.2.6 2,779 6/22/2021
3.2.5 930 6/21/2021
3.2.4 788 6/16/2021
3.2.3 836 6/11/2021
3.2.2 1,009 6/3/2021
3.2.1 19,277 5/28/2021
3.2.0 615 5/28/2021
3.1.16 7,762 5/14/2021
3.1.15 6,863 4/16/2021
3.1.14 5,035 4/9/2021
3.1.12 3,280 3/23/2021
3.1.11 5,013 3/17/2021
3.1.10 1,294 3/16/2021
3.1.9 2,834 3/15/2021
3.1.8 589 3/15/2021
3.1.7 1,076 3/11/2021
3.1.6 649 3/11/2021
3.1.5 7,062 2/18/2021
3.1.4 1,010 2/12/2021
3.1.3 591 2/12/2021
3.1.2 10,591 1/25/2021
3.1.1 6,194 1/13/2021
3.1.0 1,056 1/11/2021
3.1.0-beta-001 455 1/8/2021
3.0.5 2,089 12/22/2020
3.0.4 1,335 12/19/2020
3.0.3 684 12/18/2020
3.0.2 1,206 12/16/2020
3.0.1 1,370 12/11/2020
3.0.0 3,485 12/4/2020
3.0.0-nagareyama-rc-011 695 12/2/2020
3.0.0-nagareyama-rc-010 573 11/28/2020
3.0.0-nagareyama-rc-009 1,121 11/25/2020
3.0.0-nagareyama-rc-008 646 11/19/2020
3.0.0-nagareyama-rc-007 872 11/15/2020
3.0.0-nagareyama-rc-006 666 11/13/2020
3.0.0-nagareyama-rc-005 485 11/12/2020
3.0.0-nagareyama-rc-004 542 11/10/2020
3.0.0-nagareyama-rc-003 514 11/9/2020
3.0.0-nagareyama-rc-002 606 11/8/2020
3.0.0-nagareyama-rc-001 599 11/7/2020
3.0.0-nagareyama-beta-005 534 10/31/2020
3.0.0-nagareyama-beta-004 681 10/27/2020
3.0.0-nagareyama-beta-003 515 10/25/2020
3.0.0-nagareyama-beta-002 643 10/23/2020
3.0.0-nagareyama-beta-001 477 10/23/2020
3.0.0-nagareyama-alpha-017 453 10/22/2020
3.0.0-nagareyama-alpha-016 458 10/22/2020
3.0.0-nagareyama-alpha-015 519 10/19/2020
3.0.0-nagareyama-alpha-014 538 10/18/2020
3.0.0-nagareyama-alpha-012 490 10/15/2020
3.0.0-nagareyama-alpha-011 484 10/15/2020
3.0.0-nagareyama-alpha-010 504 10/13/2020
3.0.0-nagareyama-alpha-009 519 10/11/2020
3.0.0-nagareyama-alpha-008 591 10/5/2020
3.0.0-nagareyama-alpha-007 517 10/2/2020
3.0.0-nagareyama-alpha-006 502 9/30/2020
3.0.0-nagareyama-alpha-005 445 9/29/2020
3.0.0-nagareyama-alpha-004 525 9/28/2020
3.0.0-nagareyama-alpha-003 496 9/14/2020
3.0.0-nagareyama-alpha-002 474 9/13/2020
3.0.0-nagareyama-alpha-001 598 9/13/2020

## Fixed

- [JS/TS] Propagate non-captured exception when running `Async.Start` or `Async.StartImmediate` (by @MangelMaxime)
- [JS/TS] Report an error at compilation time when trying to use `Async.RunSynchronously` (by @MangelMaxime)